use rewind() after _load

Author: vickyliin

vcr/cassette.py

@@ -243,7 +243,10 @@ def append(self, request, response):
         response = self._before_record_response(response)
         if response is None:
             return
+
         self.data.append((request, response))
+        self.play_counts[len(self.data) - 1] += 1
+
         self.dirty = True
 
     def filter_request(self, request):
@@ -294,6 +297,7 @@ def responses_of(self, request):
 
     def rewind(self):
         self.play_counts = collections.Counter()
+        self.rewound = True
 
     def find_requests_with_most_matches(self, request):
         """
@@ -345,7 +349,7 @@ def _load(self):
             for request, response in zip(requests, responses):
                 self.append(request, response)
             self.dirty = False
-            self.rewound = True
+            self.rewind()
         except (CassetteDecodeError, CassetteNotFoundError):
             pass